Belting



Patented Aug. 8, 1944 UNITED STATES PATENT OFFICE BELTING Application September 1, 1942, Serial No. 456,866

2 Claims.

This invention relates to belts for transmission of power, and more particularly to a leather V-belt.

Heretofore fiat leather belting has been used extensively for power transmission but all efforts to produce a satisfactory leather V-belt have failed. In the flat leather belt the grain of the leather is in contact with the pulley furnishing the desired frictional pulling effect whereas the body of the leather furnishes the necessary strength.

In the transmission of power by pulleys having a V-shaped groove and V-belts, the frictional engagement is between the side walls of the groove and the sides of the belt. V-belts formed of rubber, or rubber and fabric compositions, have heretofore been extensively used. When attempts have been made to use V-belts formed of leather, the belts have been so fabricated that raw edges of the leather came in contact with the walls of the groove. This resulted in overheating of the belt, undue wear of the belt and generally unsatisfactory performance.

In constructing the V-belt forming the subject matter of the present invention, I provide a number of layers of leather which are cemented together to provide the proper thickness. These layers are also of gradually increasing width to provide sides parallel to the walls of the groove of the pulley. To these sides I then cement a layer of heavy grain split leather entirely covering the raw edges of the body portion of the belt or entirely covering the side, top and bottom of I the belt. The heavy grain leather is therefore in contact with the walls of the groove of the pulley and produces the same frictional pulling effect as the grain surface of a flat belt. At the same time the fabricated body portion of the belt supplies the requisite strength. As a result, the belt runs cooler and is more efiicient. Experience has shown that a leather V-belt fabricated in this manner will pull greater loads without slipping than any other form of belt.

In the accompanying drawing I have shown several formsof the invention. In this showing:

Fig. l is a perspective view of a section of leather V-belt constructed in accordance with my invention; and

Fig. 2 is a perspective view of another form of leather V-belt constructed in accordance with my invention.

Referring to the drawing, the reference numerals I, 2 and 3 designate a plurality of layers of leather cemented to each other. While I have illustrated the use of three layers, it will be apparent that a greater or lesser number may be employed. The layers are of greater width at their tops than at their bottoms, providing side walls 4 at the desired angle, which is the angle of the wall of the groove of the pulley.

To provide the proper engagement between the side walls of the belt and the walls of the groove of the pulley, I provide a facing 5 of heavy grain plit leather on each side. This facing is cemented to the body portion of the belt.

In the use of the belt the side walls 5 of heavy grain leather engage the walls of the groove of the pulley. By having the grain leather in contact with the pulley the same frictional pulling effect is obtained as that obtained by the grain of a flat belt in conjunction with a flat pulley. At the same time the body formed of the layers 1, 2 and 3 supplies the necessary strength. The belt therefore runs cool, is eificient, and is capable of pulling great loads without slipping.

In Fig. 2 of the drawing I have shown a belt similar to that shown in Fig. 1 comprising a plurality of layers I, 2 and 3 with the facings 5 of heavy grain split leather on each side. As shown in Fig. 2, the top of the belt may also be covered with a facing 6 of heavy grain split leather and the bottom of the belt may be covered by a similar facing 1.

I claim:

1. A leather V-belt comprising a plurality of layers of leather secured to each other to form a body portion having parallel upper and lower faces and inclined side walls, and a thin strip of grain split leather secured to each side Wall.

2. A leather V-belt comprising a plurality of layers of leather secured to each other, each layer being of trapezoidal cross section, the longer face of one layer being adjacent the shorter face of the next layer to form a body of trapezoidal cross section, and a thin :facing of grain split leather secured to each side wall.

GEORGE ARTHUR, SCI-HEREN, JR. 

